You are effectively just proposing an enormous tax (read: price increase) on renters, which seems like the exact opposite of what needs to be achieved. I would support completely repealing prop 13 though.

Demonizing landlords, developers, and property investment firms at best does nothing and at worst actively makes the housing situation worse by further restricting supply. No amount of disincentives to property ownership will solve the core, fundamental problem that _there is not enough housing_. Any solution that doesn't increase supply is no solution at all.